Separation of dry materials



y 1932- K. c. APPLEYARD ET AL 1,866,186

SEPARATION OF DRY MATERIALS Filed Jan. 4, 1929 inn/624775 Bf Omwa Patented July 5, 1932 un ts STATES f KENELM CHARLES APPLEYARDQOF BIRTLEY, COLIN WILITIAM HieiiAM HOLMESybF Low FELL, AND rvonv LLOYD BRAMWELL, or BIRTLEY, ENGLANDQASSIGNORS To THE BIRTLEY men COMPANY, LIMITED, or-srnrnny, ENGLAND v SEPARATION DRY MATERIALS Application filed January 4, 1929, Serial N0. 330,364=, and in Great Britain January 24, 1928.

This invention relates to the separation of dry materials. It is particularly directed to the separation of slate or other impurities or refuse from coal, that is, to the dry clean:

ing of coal, but it is not limited thereto, and

includes the cleaning and grading of agricultural and mineral products and the like generally.

The object of the invention is to provide an improved apparatus for this purpose.

The invention will be described herewith mainly with reference. to the cleaning of coal.

In previous apparatus of this type, where rifles have been used, these have been made straight, both as regards the deck rifles and as regards the tailing rifles. Similar remarks apply to the banking bars against which the coal or the like becomes banked during the process of separation. The result of this is that there is or is likely to be a check where angles are encountered.

The present invention consists in the substitution of curved members for straight members in respect of one or more of the following features,viz., (a) deck rifles, (b) tailing rifles, and (0) banking bars.

The invention also consists in the improvements in and relating to the separation of dry materials hereinafter described.

In the accompanying drawing Figure 1 is a diagrammatic view of the apparatus.

Fig. 2 is a sectional View on line 2.2 of Fig. 1.

In carrying the invention into efiect according to the form illustrated by way of example, the table a of a coal cleaning machine is made with a banking bar I), curved through.

part of its length, curved deck rifles c and a curved tailing bar or tailing rifle d. The

banking bar 7) may be a continuous curve of substantial curvature for about the final one-third of the table, gradually merging into a straight line at the part corresponding with the feed section, that is from the delivery end 0 to the feed end f as shown. The deck rifles 0 may bein two parts, namely the rifles of the feed section, and the rifles of the tailing or delivery section, but angles -A'rlEurif firs!one;

shbuldbe avoided in P g from one section to the other as faras possible.- The tailing .rifle-d may be in the form of a continuous curve'as shown, extending from the delivery ende to the feedend f, the part at the delivery end being of substantial curvature'and merging into the rifles at the feed end, these riflesbeing of less curvature or in the limit becoming straight lines. Referring to Figure 2 an Inside the chest are fixedsupporting angles which carry the deck frame'lc, the deck sur-. face being formed of an air pervious surface 1 fixed to stretcher bars or ribs m. Rifles 0 arefixed tothe surface of the deck, aspace n being left between the ends of the rifles c and the bankingbar bto form a shale path ",Anadjustable tailing rifle d is, clamped to and of the same inclination, or of diflferent inclinations in different parts, but preferably they are curved.

The invention may be applied totables in which separation is effected by means of is not necessarily limited to such use.

air chest g is: formed of a bottom plate h and side plates 7'.

.85 vibration plus air pressure, and to those a cases where no vibration is employed. butmay also be applied in connection with sepabove, viz., banking bars, tailing riflesand deck rifles, may vary according to the re sults desired, and to the tables to which they are applied' In some cases they may be 'ters'Patent is cycloid or they may be parabolic in cases.

The invention may be used in connection with the matters described in our co-pending applications Serial Nos. 3305368 and other 330,365, filed J 2111.4, 1929. It is not limited to the tables referred to above and it may be applied to those tables where there is g a double separation at the delivery end.

- Having now described our invention, What we claim as new and desire to secure by Let- 1. An apparatus for the separation of dry material comprising anelongated table for the pneumatic separation of material consisting of a feed portion anda concentrating portion a curved banking bar and a curved atailing rifHe,"-the'rifi?les ofthe concentrating ortion'bein curved and dis osed in acute angular relation with respect to the tailing e 2. An apparatus for the separation of dry I material comprisingan elongated tablefor the pneumatic separationvof material consis'ting of a feed portion, a concentrating por- 'tion, a nd a delivery endy a curved banking .bar-

curved tailing rifile extending along the longitudinal edges of the table,- said banking bar and rifile gradually converging toward each other 'in a direction from the feeding end to the delivery end of the table, the riiHes of the concentrating portion being curvdand" disposed inacute angular rifiie.

r In testimony whereof we'have signed our names to this specification.

- KENELM CHARLES APPLEYARD.

COLIN WILLIAM HIGHAM HOLMES.

IVOR LLOYD BRAMWELL.

relation with respect to the tailing CERTIFICATE OF CORRECTION.

Patent No; 1,866,186. July 5, 1932.

KENELM CHARLES APPLEYARD ET AL.

it is hereby certified that the above numbered patent was erroneously issued to "The Birtiey Iron Company, Limited, of Birtley, England", asassignee of the it entire interest in said invention, whereas said patent should have been issued to the inventors, said Appleyard Et'al and TheBirtley "Iron:Company ,i' Limited, of-

Birtley, England, as assignee of one-fourth interest only, as shownbv-the records of assignments in this office; and that'the said Letters Patent should be read with this correction therein that the same may conform to the record of the ease in the Patent Office.

Signed and sealed this 22nd day of November, A. D. 1932.

M. J. Moore,

(Seal) Acting Commissioner of Patents.. 

